each time my linux is booting, it check something like eth0 and something else. but there is something i write below that fail... Code: could not receive return value from daemon proccess?
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I have a script in /etc/rc.d/init.d named foo. I want to start/stop/restart my process as follows:$ foo start But I do not see the [OK] message once it starts. There is no shell prompt returned either. It seems that my own process is the problem. The executable that foo calls is built from this sample code:
int main()
{
do {
printf("Hello world
");
sleep(1);
} while (1);
}
Do I have to return some kind of signal handle for this to work?
my code is very simple:
int pid, status;
printf("parent process id=%d, to call fork
",getpid());
if(pid=fork()<0)
[Code].....
but everytime I can only get two fork return pid=0. In parent process, the pid returned by fork() should be >0 and equal to the child process id.
I want to write an operating system of my own ! I've started studying Minix. For getting started I wanted to know is there a way to write and add a background process [printing 'hello'] in the Minix operating system ?
View 7 Replies View RelatedGetting this error seemingly randomly at login:
There was an error starting the GNOME Settings Daemon.
Some things, such as themes, sounds, or background settings may not work correctly.
The last error message was:
Launch helper exited with unknown return code 1
GNOME will still try to restart the Settings Daemon next time you log in.
I thought I might be logging in to fast, but it happened again when I had waited several minutes.
I am using pthread_create system call to create a thread. However pthread_create does not return the PID ( process ID). Is there any quick way to fınd the PID of the created thread.
View 1 Replies View RelatedI am want get next information: Get process statistics from kernel and return them buf as
Quote:
number of processes : ticks_user : ticks_system : ticks_interrupt : cpuseconds : procsizes : resident segment sizes I am find some this information in /proc/[pid]/stat, but there are is not data about ticks system, ticks_interrupt, cpusecond. Where I am can find it information???
I am write on C, better if it will file witch information, and not programm.
Is it possible to have an Expect script spawn an SSH session, log in, then go into interactive mode and give control of the SSH session to a Bash script? Here's a simplified example of the script so far:
Code:
#!/bin/bash
expect -c "
[code]....
I currently have sendmail installed. It starts as a daemon but I want to avoid doing that. I want to start it manually.Also am a dynamic host.so every time i start my computer my ip changes. I use ddclient to update my records at dyndns.com.but how to configure sendmail in the case of dynamic hosts since it looks at the file /etc/hosts which contains information about the static hosts.
View 2 Replies View RelatedI've just installed subversion.I need to create a script /etc/init.d/svnserve that will start at boot time.I want to use start-stop-daemon --start so I can track my process and eventually kill it using start-stop-daemon --stop.My problem is that I can't get it to work and the documentation shows no exemple.
I've replaced $DAEMON by the whole line: svnserve -d -R -r $REPO_ROOT and got -d is not an option.I'm not quite sure what to do at that point. If someone has some experience with start-stop-daemon it would be great.
know abt daemon process and how it is used for acting as proxy server if nay tutorial is there for it .
View 3 Replies View Relatedone tell me the internal working of kill command. that is how it kills a process internally or from where it picks file to continue its process.
View 3 Replies View RelatedI have a high priority service that I start with sudo nice -n -10 process. This process does not need superuser rights though, except for the priority elevation. But nice requires superuser privileges to elevate priority.
View 3 Replies View Relatedsend the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.
View 4 Replies View RelatedCode:
#include <stdio.h>
#include <unistd.h>
#include <signal.h>
[code]....
Description of what the code does or what i intended to do:
1. Created a child process from parent process using 'fork()'
2. Sent a signal 'SIGALRM' from child process to parent process using 'sigqueue' function.
(The Third parameter of 'siqueue' function contains the message (message msg) which the child process wants to send to the parent process.'msg' is a stucture instance containing a) pid of child and b) string) 5. Print the 'msg' sent by child process inside the signal handler function 'sig_action_function' of the parent process I am getting some junk value when this line is executed
Code:
printf("%d
",msg->cpid);
I expected to get the pid of child process, which the child process sent to parent process through the signal.
as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.
So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.
How do you find the parent process of zombie processes?
When the child process is something where the parent is not entirely obvious...
Is there some way to list processes in tree format or something?
I have a process running on Linux.When i do ps -eaf | grep <myProcess>, it show muliple entries for <myProcess> with different pids for each entry.Kindly tell me what could be the reason for a process having multiple pids?
View 1 Replies View RelatedI want ro ran new commandy after sungrid finish his task.Exp:qsub -q bla command1; command2 command2 start only when job of command1 finished.
View 9 Replies View RelatedI've been running my shellscript for about half an hour now. It's taking longer than I thought to process all the data. I have the process ID of it. Is it possible to save the process and log out then log in and continue the process? I know how to pause a process using kill -pause pID and continue it using kill -cont pID. But that only work if you don't log out after pausing it.
View 5 Replies View Relatedok, I pressed alt-ctrl-f1 and it displayed my screen with a gui. I then pressed alt-ctrl-f2 and it displayed a textual desktop. I pressed alt-ctrl-f3 and it displayed the same thing. When I pressed alt-ctrl-f1 to return to my gui, it would not let me return to a gui. I was stuck in a cmd line textual desktop.
How, without restarting, do i return to a gui once I press alt-ctrl-f2??
I have an Ubuntu Linux on a VMWare running and I've installed RPM Package Manager. However when I try to query all packages using the rpm -qa command, I don't get any results returned.
View 2 Replies View RelatedI'm trying to get a return value from the command running within screen. I have tried
Code:
screen "some_command ; echo $? > retval"
but this refuses to write "retval".
[code]....
I am writing a script that will give me the network address that a host belongs to, for example if a machine has a ip address of 192.168.1.4 I want the script to give me 192.168.1.0.
I am able to get the ip address echoed using:
Code:
I am having trouble getting the ip address stored as a variable so I can work with it, below is what I have
Code:
Alex accidentally deletes his PATH variable.what are some of the problems he may soon encounter and explain the reasons for these problems. How could he easily return PATH to its original value?
View 14 Replies View Relatedwhy does md5sum return a dash at the end:
Code:
$ md5sum
string290350295 -
How can I remove this using the md5sum tags?
I have called an script in cronjob named get_mac.sh as follows:
#!/bin/sh
MAC=`ifconfig eth0 |sed -n 1p|awk '{print $5}'|awk -F : '{print $1$2$3$4$5$6}'`
ARG_FILE="/etc/asterisk/scripts/server.params"
[code]....
I am trying to automate yum update of specific package on a remote machine.So far I have this:
#!/bin/bash
# Update my system
if ! yum update w3m
then
failure=1
[Code]...
Anytime someone tries to send me files over YIM or AIM when I am using Pidgin 2.7.5 on Arch Linux, it fails mid-transfer, telling me that they cancelled, and telling them that I cancelled. The same computer using Pidgin on Windows manages to transfer these files successfully.Is there some sort of checklist for these issues?
View 4 Replies View Relatedso I'm really new to using Linux, and I searched the forums, but most people seem to have trouble sending mail, not receiving it. When I send mail from the CLI, it gets delivered fine (from travis@travishoward.net) But when I try to reply or mail to the server, I get this message back:
Code:
----- The following addresses had permanent fatal errors ----- <travis@travishoward.net>
(reason: 554 5.7.1 <travis@travishoward.net>: Relay access denied)
[code]...
